Newbie ? with $ reward - Postfix: Limit the # of messages sent per SMTP Connections

Hello everyone - this is my first board message. I hate to ask for help but i'm new to Postfix and I'm trying to solve an issue with mail delivery. I appreciate everyone's time and if someone helps me solve this issue i'll send them a token paypal $5 payment - I know its nothing much but it is a show of my appreciation.